Gas burner



C. A. SCOGIN May 30, 1961 GAS BURNER Filed Aug. l5, 1955 INVENTOR. c //Wb/'d ,4. 500g/f2 BY IW? United States GAS lBURNER I .Clifford A. Scogin, 1030 Cleveland, Kansas City, Mo. Filed Aug. 1s, 1955, ser. No. 528,318

1 Claim. (cl. 15s-7) This invention relates to heating equipment and has for its primary object the provision of a fuel burning device in which the supply of air and fuel is so controlled as to cause greater efciency in the burning of the fuel.

It is an important object of the present invention to provide a fuel burning device having an electric motor driven blower coupled with the burner to provide an artifcial current of air through the burner and into the cornbustion chamber. A further important object is the provision of a fuel burning device in which the fuel emanating from the burner into the combustion chamber is ignited by an ignition tube disposed a substantial distance from the outlet end of the burner and adapted for directing a tlame into the combustion chamber, the fuel emanating from the ignition tube being ignited by a constantly burning pilot burner adjacent the outlet end of the tube.

Also an object of the present invention is the provision of a fuel burning device in which -a pressure sensitive switch is located in the conduit connecting the ignition tube with the fuel supply line, the switch being operably connected with an electric circuit to the blower motor whereby when gas is allowed to pass through the conduit to the tube the switch is closed and the blower motor is energized.

Other objects include important details of construction, all of which will be made clear or become apparent as the following specification progresses, reference being had to the accompanying drawing, wherein:

Figure 1 is a fragmentary, top plan view of a gas burner embodying the instant invention, parts being broken away and in section to reveal details of construction; and

Fig. 2 is a partially schematic, fragmentary, cross sectional view taken on the line II-all of Fig. l.

The fuel burning device of the present invention, designated rbroadly lby the numeral 10, is especially adapted for association with a heater 12, having a side wall 14 and a combustion chamber 16. Device includes a tubular burner 18 having an air inlet 20, a mixing chamber 21 and an outlet 24, the outlet being disposed within the combustion chamber 16. Coupled to the inlet 20 is a blower 22, driven by an electric motor 24, in turn cnnnected in a circuit 26 as schematically illustrated in Fig. 2. Blower 22 is provided with a slidable door 23 for regulating `the amount of air entering the blower, the door disposed so as to allow the air to enter the center of said blower.

A perforated, internally threaded boss 28 on the burner 18 and communicating with the mixing chamber 21` houses a removable, externally threaded, fuel injection nozzle 30 having an orifice 33 opening into the chamber 21. Also threaded into boss 28 outwardly of the nozzle 30 is one end of a supply line 32 for pressurized fuel, the line 32 having a thermostatically controlled valve (not shown) to regulate the ow of fuel through nozzle 30 into burner 18.

An Lshaped bracket or heat baille 34 mounts a Venturitype ignition tube 36 having an air inlet 38, a fuel injec- 2,986,207 Patented May so, 1961 tion nozzle 40, and an outlet 42 extending through opening 37 of the wall 14 into heater 12 but remote from the combustion chamber 16. A conduit 44 interconnects nozzle 40 and boss 28.

Also mounted on baille 34 is a constantly burning pilot burner 48 and fuel supply line 46, the openings 50 of the burner 48 being adjacent the outlet 42 of burner 36. An outwardly extending ange '52 integral with the pilot burner 48 rigidly mounts a thermo-couple 54 operably connected to the fuel supply valve in line 32 to automatically close the latter if the pilot llame should accidentally be extinguished as is well known.

A conduit 60 coupled to conduit 44 and leading to a pressure responsive device 62 provides means for operating the switch 64 in circuit 26.

In operation, when the thermostatically controlled valve i in line 32 is opened, the fuel passes through orifice 33 into chamber 21 as well as into tube 36 via conduit 44 and nozzle 40.

The pressure of the fuel in line 60 depresses a diaphragm 68 in the pressure device 62 to close the switch 64 and energize the motor 24, thus driving the blower 22 to force air into chamber 21.

Fuel emanating from orifice 33 is mixed in chamber 21 with the current of air from the blower 22, and then blown into the combustion chamber 16. The fuel emanating from conduit 44 draws air in to ignition burner 36 via inlet 38 air-gas admixture owing from outlet 42 is ignited by the pilot burner 48. Because of the restricted opening of the nozzle 40 and the pressure of the fuel a llame 66- is directed into the combustion chamber 16 to ignite the fuel owing from outlet 24.

From the foregoing it can be readily seen that the sup-v ply of air and fuel to the burner is automatically controlled since the blower 22 operates only when the cir cuit 26 is closed by switch 64, the ignition burner 36- shoots a ame into the combustion chamber only while fuel enters conduit 40, and fuel enters mixing chamber 21 while the main supply valve is open, the whole operation being synchronized by the opening and closing of such thermostatically operated -main control valve in' line 32.

Also noteworthy in the instant invention is the factV that the ignition tube 36 is located remotely -from the combustion chamber 16, thus eliminating any danger of the flame being blown out by the fuel-air mixture emanating from outlet 24. Additionally, the pilot burner 48 and ignition burner 36 are located remotely from the zoneof intense heat near the combustion chamber 16, there fore materially lengthening the useful life of the equipment.

The provision of door 23 in blower 22 is important from the standpoint that a very fine adjustment is possible in maintaining the desirable air to gas ratio, regardless of the variance in B.t.u. rating per cubic foot of the gas emanating from the supply line 32.

Having thus described the invention what is claimed as new and desired to be secured by Letters Patent is:

In a fuel burning device, structure having a combustion chamber provided with a fuel burner receiving opening and a side wall spaced from the chamber a suficient distance to be out of the extreme heat zone of the same, said side wall being provided with an aperture in substantial alignment with said opening; an elongated, tubular fuel burner in the structure and having air and fuel inlets at one end thereof, said burner extending through the aperture and said opening with said one end thereof disposed exteriorly of the side wall and the other end thereof being located within the combustion chamber; blower means coupled with said air inlet for creating artificial currents of air and forcing the same through the burner and out of said other end thereof into the chamber; a pressurized gaseous fuel supply line coupled with the fuel inlet for feeding fuel into the path of travel of air through the burner; an elongated ignition tube in the structure and provided with air and fuel orifices at one end thereof and an outlet on'ce at the other end thereof, said tube being located in proximal, parallel relationship to the burner with said one end thereof disposed exteriorly of the side wall and said other end thereof terminating between and in closer proximity to the side wall than said chamber and out of said cxtremeheat zone of the same', a pressurized gaseous fuel conduit connected with said fuel orifice of the tube for directing fuel under suicient pressure from said supply line into the tube to direct an elongated flame from said outlet orifice into the combustion chamber to said outlet of the burner; and a constantly burning, tubular pilot burner disposed in the structure adjacent to and parallel with the tube and having an inlet aperture at one extremity thereof and an outlet aperture at the other extremity thereof, said one extremity of the pilot burner being located exterorly of said 4side Wall land the other extremity thereof being disposed adacent said other end of the tube to ignite the fuel emanating from the same.

References Cited in the file of this patent UNITED STATES PATENTS 794,429 Skevington et a1 July 11, 1905 1,391,385 Jacobsen Sept. 20, 1921 1,635,634 Pohl July 12, 1927 1,675,133 Rayeld June 26, 1928 1,851,263 Roach Mar. 29, 1932 2,101,393 Herbster Dec. 7, 1937 2,153,497 Betzold Apr. 4, 1939 2,201,385 Woodson May 21, 1940 2,539,153 Muehleison Jan. 23, 1951 FOREIGN PATENTS 1,011,763 France June 26, 1952 107,375 Sweden Mar. 18. 1943 

